com.facebook.presto.common.block

Class SingleRowBlock

java.lang.Object

com.facebook.presto.common.block.AbstractSingleRowBlock

com.facebook.presto.common.block.SingleRowBlock

All Implemented Interfaces:

Block, UncheckedBlock

public class SingleRowBlock
extends AbstractSingleRowBlock

Field Summary

Fields inherited from class com.facebook.presto.common.block.AbstractSingleRowBlock

rowIndex

Method Summary

Modifier and Type	Method and Description
Block	appendNull() Returns a block that has an appended null at the end, no matter if the original block has null or not.
boolean	equals(Object obj)
OptionalInt	fixedSizeInBytesPerPosition() Returns the number of bytes (in terms of Block.getSizeInBytes()) required per position that this block contains, assuming that the number of bytes required is a known static quantity and not dependent on any particular specific position.
String	getEncodingName() Get the encoding for this block.
Block	getLoadedBlock() Returns a block that assures all data is in memory.
int	getPositionCount() Returns the number of positions in this block.
protected Block	getRawFieldBlock(int fieldIndex)
long	getRetainedSizeInBytes() Returns the retained size of this block in memory, including over-allocations.
int	getRowIndex()
long	getSizeInBytes() Returns the size of this block as if it was compacted, ignoring any over-allocations.
int	hashCode()
void	retainedBytesForEachPart(ObjLongConsumer<Object> consumer) consumer visits each of the internal data container and accepts the size for it.
String	toString()

Methods inherited from class com.facebook.presto.common.block.AbstractSingleRowBlock

bytesCompare, bytesEqual, compareTo, copyPositions, copyRegion, equals, getBlock, getBlockUnchecked, getByte, getByteUnchecked, getEstimatedDataSizeForStats, getInt, getIntUnchecked, getLong, getLong, getLongUnchecked, getLongUnchecked, getOffsetBase, getPositionsSizeInBytes, getRegion, getRegionSizeInBytes, getShort, getShortUnchecked, getSingleValueBlock, getSlice, getSliceLength, getSliceLengthUnchecked, getSliceUnchecked, hash, isNull, isNullUnchecked, writeBytesTo, writeBytesTo, writePositionTo, writePositionTo

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.facebook.presto.common.block.Block

getApproximateRegionLogicalSizeInBytes, getLogicalSizeInBytes, getPositions, getRegionLogicalSizeInBytes, mayHaveNull

Method Detail

getRawFieldBlock

protected Block getRawFieldBlock(int fieldIndex)

Specified by:

getRawFieldBlock in class AbstractSingleRowBlock

getPositionCount

public int getPositionCount()

Description copied from interface: Block

Returns the number of positions in this block.

getSizeInBytes

public long getSizeInBytes()

Description copied from interface: Block

Returns the size of this block as if it was compacted, ignoring any over-allocations. For example, in dictionary blocks, this only counts each dictionary entry once, rather than each time a value is referenced.

fixedSizeInBytesPerPosition

public OptionalInt fixedSizeInBytesPerPosition()

Description copied from interface: Block

Returns the number of bytes (in terms of Block.getSizeInBytes()) required per position that this block contains, assuming that the number of bytes required is a known static quantity and not dependent on any particular specific position. This allows for some complex block wrappings to potentially avoid having to call Block.getPositionsSizeInBytes(boolean[], int) which would require computing the specific positions selected

Returns:

The size in bytes, per position, if this block type does not require specific position information to compute its size

getRetainedSizeInBytes

public long getRetainedSizeInBytes()

Description copied from interface: Block

Returns the retained size of this block in memory, including over-allocations. This method is called from the inner most execution loop and must be fast.

retainedBytesForEachPart

public void retainedBytesForEachPart(ObjLongConsumer<Object> consumer)

Description copied from interface: Block

consumer visits each of the internal data container and accepts the size for it. This method can be helpful in cases such as memory counting for internal data structure. Also, the method should be non-recursive, only visit the elements at the top level, and specifically should not call retainedBytesForEachPart on nested blocks consumer should be called at least once with the current block and must include the instance size of the current block

getEncodingName

public String getEncodingName()

Description copied from interface: Block

Get the encoding for this block.

getRowIndex

public int getRowIndex()

toString

public String toString()

Overrides:

toString in class Object

getLoadedBlock

public Block getLoadedBlock()

Description copied from interface: Block

Returns a block that assures all data is in memory. May return the same block if all block data is already in memory.

This allows streaming data sources to skip sections that are not accessed in a query.

appendNull

public Block appendNull()

Description copied from interface: Block

Returns a block that has an appended null at the end, no matter if the original block has null or not. The original block won't be modified.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object